Preheat the oven to 350. Spray donut pan with nonstick cooking spray.

In a medium bowl, combine the flour, baking powder and salt.

In a small bowl, whisk together the brown sugar and egg until light and fluffy. Add milk, Greek yogurt and vanilla and whisk until smooth. (You want to break up all the yogurt clumps.)

Add the wet ingredients to the dry ingredients and stir to combine, but don’t overmix.

You can spoon the mixture into the prepared donut pans, but I prefer to add the batter to a plastic bag, snip a corner and pipe it in.

Bake donuts at 350 for 8-10 minutes, until done.

Meanwhile, melt butter in a small, shallow bowl. Combine sugar and cinnamon in a separate small, shallow bowl.

Remove donuts from oven and turn out onto a kitchen towel or paper towels to prevent them from getting soggy in the pan. Let cool for a minute or two, turning the donuts over once.

Dunk each donut in butter then in cinnamon sugar, pressing down and twisting the donut to get it to adhere all over.

Serve warm and enjoy!